Submission #867479

#	Time	Username	Problem	Language	Result	Execution time	Memory
867479		Halym2007	Longest beautiful sequence (IZhO17_subsequence)	C++17	0 / 100	2 ms	348 KiB

subsequence

#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N = 2e5 + 5;
#define pb push_back
#define sz size()
#define ff first
#define ss second
int a[N], k[N], dp[N], jogap, n, par[N], idx;
vector <int> cykar;
int main () {
	freopen("subsequence.in", "r", stdin);
	freopen("subsequence.out", "w", stdout);
	ios::sync_with_stdio(0);
	cin.tie(0);cout.tie(0);
	cin >> n;
	for (int i = 1; i <= n; ++i) {
		cin >> a[i];
	}
	for (int i = 1; i <= n; ++i) {
		cin >> k[i];
	}
	for (int i = 1; i <= n; ++i) {
		dp[i] = 1;
		par[i] = i;
		for (int j = 1; j < i; ++j) {
			int x = a[j] & a[i];
			if (__builtin_popcount(x) == k[i]) {
				if (dp[i] < dp[j] + 1) {
					dp[i] = dp[j] + 1;
					par[i] = j;
				}
			}
		}
		if (jogap < dp[i]) {
			jogap = dp[i];
			idx = i;
		}
	}
	cout << jogap << "\n";
	while (1) {
		cykar.pb (idx);
		if (idx == par[idx]) break;
		idx = par[idx];
	}
	reverse(cykar.begin(), cykar.end());
	for (int i : cykar) {
		cout << i << " ";
	}
}

Compilation message (stderr)

subsequence.cpp: In function 'int main()':
subsequence.cpp:12:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |  freopen("subsequence.in", "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
subsequence.cpp:13:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  freopen("subsequence.out", "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 16
• Subtask 3: 0 / 17
• Subtask 4: 0 / 60